Investigate logs include ckey of source (if applicable) (#71833)

## About The Pull Request
All investigate logs start with [src], which can be any atom. So
sometimes names and items get printed twice. Adds ckeys to the
investigate_logs of living mobs.


![image](https://user-images.githubusercontent.com/66640614/206372340-3c50bc9d-b662-4a4d-b1ec-91c0b4db8a39.png)


## Why It's Good For The Game
Better logging, includes the ckey for living mobs in investigate logs,
and fixes some investigate_death logs that weren't properly attributed
to mobs.

## Changelog

🆑 Tattle
admin: investigate logs include ckey of source (if applicable)
/🆑

Co-authored-by: tattle <article.disaster@gmail.com>

code/game/objects/items/stacks/stack.dm

@@ -402,7 +402,7 @@
 
 	// Use up the material
 	use(recipe.req_amount * multiplier)
-	builder.investigate_log("[key_name(builder)] crafted [recipe.title]", INVESTIGATE_CRAFTING)
+	builder.investigate_log("crafted [recipe.title]", INVESTIGATE_CRAFTING)
 
 	// Apply mat datums
 	if(recipe.applies_mats && LAZYLEN(mats_per_unit))